Robert De Niro, eg (5)
I believe the answer is:
actor
'robert de niro eg' is the definition.
(I know that Robert De Niro has the occupation actor)
This is all the clue.
(Other definitions for actor that I've seen before include "Cruise, e.g." , "Stage player" , "Theatrical performer" , "Gielgud, say" , "Theatre player" .)